(Ga,Mn)As based superlattices and the search for antiferromagnetic interlayer coupling

TL;DR

This paper explores the potential for antiferromagnetic interlayer coupling in (Ga,Mn)As superlattices using mean-field theory, aiming to enable large magnetoresistance effects similar to giant magnetoresistance in metals.

Contribution

It provides a theoretical analysis of (Ga,Mn)As superlattices to identify conditions for antiferromagnetic coupling and proposes practical approaches to realize such structures.

Findings

Potential for antiferromagnetic coupling identified

Parameter space exploration suggests feasible superlattice designs

Guidelines for experimental realization proposed

Abstract

Antiferromagnetic interlayer coupling in dilute magnetic semiconductor superlattices could result in the realisation of large magnetoresistance effects analogous to the giant magnetoresistance seen in metallic multilayer structures. In this paper we use a mean-field theory of carrier induced ferromagnetism to explore the multidimensional parameter space available in (Ga,Mn)As based superlattice systems. Based on these investigations we examine the feasibility of creating a superlattice that exhibits antiferromagnetic coupling and suggest potentially viable recipes.